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OSMOSISMadison Wood & Taliah Bloxson Osmosis is the net movement of water across a selectively permeable membrane driven by a difference in solute concentrations on the two sides of the membrane.Osmosis releases energy and can be made to do work, but is a passive process, like diffusion.
What should everyone know about Osmosis?
  1. Osmosis releases energy and can be made to do work. 
  2. The word osmosis comes from the words endosmose and exosmose.
  3. Osmosis may happen when there is a partially permeable membrane, such as a cell membrane.
external image osmosis.jpg
http://www.dnatube.com/nvlab/player/player.swf?config=http://www.dnatube.com/nvlab/econfig.php?key=1094e63a15ab883d5013DIFFUSIONDiffusion describes the spread of particles through random motion from regions of higher concentration to regions of lower concentration. What are things everyone should know about Diffusion?
  1. The difference between the concentrations of molecules of a substance from the highest to the lowest concentration is called a diffusion gradient.
  2. The steeper the gradient, the faster diffusion occurs.
  3. Diffusion is one of the major mechanisms of molecular transprt in cells.
"http://player.vimeo.com/video/3360172?title=0&byline=0&portrait=0"
external image diffusion.gif


CELL MEMBRANEThe cell membrane is a biologicalcells from the outside environment
The cell membrane is a biological membrane that seperates the interior of all cells from the outside enviornment.
What should everyone know about Cell Membranes?
1. Cell membranes consist of a bilayer of lipid molecules.
2. A double layer made of phospholipids and protein molecues.
3. Different proteins on the surface that are used for many functions such as ce;; receptors, enzymes, surface antigens, and transporters.
external image cell_membrane.gif"cell" _mce_href="http://sciencestage.com/v/639/cell-membrane-active-transport.html">cell">http://sciencestage.com/v/639/cell-membrane-active-transport.html">cell